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TT: Fachverband Tiefe Temperaturen
TT 70: Correlated Electrons: General Theory 2
TT 70.5: Vortrag
Freitag, 15. März 2013, 10:30–10:45, H24
Calculations of resonant x-ray emission spectra in compounds with localized f-electrons — •Jindrich Kolorenc1, Alexander B. Shick1,2, and Roberto Caciuffo2 — 1Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic — 2European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe, Germany
We discuss a theoretical description of the resonant x-ray emission
spectroscopy (RXES) that is based on the Anderson impurity model. The
theory builds on the ideas from [1-3] and extends them to take into
account the f-electron multiplets. The parameters of the impurity
model are taken from the LDA+DMFT calculations, and the coherent
second-order optical process is calculated using the Lanczos method.
The theory is applicable across the whole f series, not only in the
limits of nearly empty (La, Ce) or nearly full (Yb) f shell. We
illustrate the method on selected f-electron systems.
[1] O. Gunnarsson and K. Schönhammer, Phys. Rev. B 28, 4315 (1983)
[2] S. Tanaka, H. Ogasawara, Y. Kayanuma, and A. Kotani, J. Phys. Soc. Jpn. 58, 1087 (1989)
[3] M. Nakazawa, S. Tanaka, T. Uozumi, and A. Kotani, J. Phys. Soc. Jpn. 65, 2303 (1996)